A jaw crusher capable of stable angle detection is provided. For this purpose, the jaw crusher includes a fixed jaw (35), a swing jaw (36) provided to oppose the fixed jaw, a frame (34) for supporting the fixed jaw and the swing jaw, and an outlet clearance adjusting mechanism (62) for adjusting an outlet clearance between the fixed jaw and the swing jaw, and the outlet clearance adjusting mechanism includes a connecting member (61) of which one end is made abut to or connected to the swing jaw, a rotatable rotary member (64) which is made abut to or connected to the other end of the connecting member, a driving mechanism (65) for rotating the rotary member, and angle detecting equipment (69) which is mounted to the frame and detects a rotation angle of the rotary member.